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authorMoni Shoua <monis@mellanox.com>2018-12-11 14:37:52 +0300
committerJason Gunthorpe <jgg@mellanox.com>2018-12-19 01:19:46 +0300
commitad8a4496757f6f7344011a20a07195bd27e3989c (patch)
tree398c3f6da4ba9337c5993d00f30402cfcf5caec3 /include/rdma
parentcbfdd442c43eab8c62bf2ea5127511cd39e9046d (diff)
downloadlinux-ad8a4496757f6f7344011a20a07195bd27e3989c.tar.xz
IB/uverbs: Add support to advise_mr
Add new ioctl method for the MR object - ADVISE_MR. This command can be used by users to give an advice or directions to the kernel about an address range that belongs to memory regions. A new ib_device callback, advise_mr(), is introduced here to suupport the new command. This command takes the following arguments: - pd: The protection domain to which all memory regions belong - advice: The type of the advice * IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH - Pre-fetch a range of an on-demand paging MR * IB_UVERBS_ADVISE_MR_ADVICE_PREFETCH_WRITE - Pre-fetch a range of an on-demand paging MR with write intention - flags: The properties of the advice * IB_UVERBS_ADVISE_MR_FLAG_FLUSH - Operation must end before return to the caller - sg_list: The list of memory ranges - num_sge: The number of memory ranges in the list - attrs: More attributes to be parsed by the provider Signed-off-by: Moni Shoua <monis@mellanox.com> Reviewed-by: Guy Levi <guyle@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'include/rdma')
-rw-r--r--include/rdma/ib_verbs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 5b3b51f00f48..0ec15d673d92 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2415,6 +2415,10 @@ struct ib_device_ops {
int (*dereg_mr)(struct ib_mr *mr);
struct ib_mr *(*alloc_mr)(struct ib_pd *pd, enum ib_mr_type mr_type,
u32 max_num_sg);
+ int (*advise_mr)(struct ib_pd *pd,
+ enum ib_uverbs_advise_mr_advice advice, u32 flags,
+ struct ib_sge *sg_list, u32 num_sge,
+ struct uverbs_attr_bundle *attrs);
int (*map_mr_sg)(struct ib_mr *mr, struct scatterlist *sg, int sg_nents,
unsigned int *sg_offset);
int (*check_mr_status)(struct ib_mr *mr, u32 check_mask,